Future research can investigate the security implications of using older versions of WhatsApp on Android 4.4.2 and explore alternative solutions for users with older devices.
Interesting topic!
Here's a potential paper on "Descargar Whatsapp Para Version De Android 4.4.2" (Downloading WhatsApp for Android version 4.4.2): Descargar Whatsapp Para Version De Android 4.4.2